trading house
/ˈtreɪdɪŋ haʊs/noun
1Especially in North America: a building in which trade or barter, especially between settlers or traders and indigenous peoples, takes place; compare trading post. Now historical.
2A firm that specializes in buying and selling merchandise, especially internationally; a company that imports and exports goods, or facilitates this process.
Origin
Mid 17th century; earliest use found in John Winthrop (1588–1649), colonial governor. From trading + house.